Good question, Hudson, as usual!
I see it this way:
The Pilot Monitoring (as it is called today
) will call "SPEED!" for an error of +10 or -5 knots, in all phases of flight.
Thus if we have determined we have to use a 20kts correction because of wind, the PM will stay silent until Vref+30.
It would be absurd to think that you should goaround at Vref+21 if you are aiming at Vref+20.
As the Training Manual states, we should keep the gust correction all the way to touch down, while bleeding off the steady correction during the flare.
So, until the beginning of the flare, on a calm day I will consider the approach to be stable until Vref +15 (+5 knots standard minimum additive, plus 10 knts
tolerance.)
Clear as mud? Maybe not!
LEM